Influence of the NaCl/LiF additives on structure, phasetransitions and dielectric properties of BSPT ceramics

3rd International Conference on Competitive Materials and Technology Processes

Golubko, N.V.^1 ; Kaleva, G.M.^1 ; Mosunov, A.V.^1 ; Politova, E.D.^1 ; Segalla, A.H.^2

Karpov Institute of Physical Chemistry, Moscow, Russia^1

ELPA Company, Zelenograd, Moscow, Russia^2

关键词: In compositions;    Morphotropic phase boundaries;    Nitrate solutions;    Phase content;    Single-phase ceramics;    Structure parameter;    Tetragonal phase;    Tetragonal phasis;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/123/1/012013/pdf
DOI  :  10.1088/1757-899X/123/1/012013

来源: IOP

【 摘 要 】

Influence of the NaCl/LiF additives (with ratio 60:40) on structure parameters, phase transitions and dielectric properties of solid solutions close to the Morphotropic Phase Boundary in the system (1-x)BiScO3 - xPbTiO3 (x=0.635, 0.645) has been studied. Using as initial the BSPT powders prepared from nitrate solutions, dense single phase ceramic samples doped by 5, 10 and 15 w. % of NaCl/LiF have been prepared at 1313 - 1323 K (2 h). Shift of the BSPT compositions phase content from initial mixtures of Rhombohedral and Tetragonal phases to the region of Tetragonal phase was stimulated by addition of the NaCl/LiF additives. This effect is accompanied by decrease of the unit sell volume, increase in the c/a ratio and increase in the Curie temperature value from 668 to 730 K for x=0.635 and from 672 to 724 K for x=0.645 in compositions doped by 10 w. % of the NaCl/LiF additive.